<?php
// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>. 
//
// This file was modified by contributors of "BOINC Web Tweak" project.

require_once("../inc/cache.inc");
require_once("../inc/util.inc");
require_once("../inc/team.inc");
require_once("../inc/db.inc");
require_once("../inc/translation.inc");

$config = get_config();
$teams_per_page = parse_config($config, "<teams_per_page>");
if (!$teams_per_page)
		$teams_per_page = 20;

define('ITEM_LIMIT', 10000);

function get_top_teams($offset, $sort_by, $type){
	global $teams_per_page;
	$db = BoincDb::get(true);
	$type_clause = null;
	if ($type)
		$type_clause = "type=$type";

	if ($sort_by == "total_credit") 
		$sort_order = "total_credit desc";
	else 
		$sort_order = "expavg_credit desc";

	return BoincTeam::enum($type_clause, "order by $sort_order limit $offset, $teams_per_page");
}

// These converter functions are here in case we later decide to use something 
// else than serializing to save temp data
//
function teams_to_store($participants)
	return serialize($participants);

function store_to_teams($data)
	return unserialize($data);

$sort_by = get_str("sort_by", true);
switch ($sort_by) {
case "total_credit":
case "expavg_credit":
	break;
default:
	$sort_by = "expavg_credit";
}

$type = get_int("type", true);
if ($type < 1 || $type > 7)
	$type = 0;

$type_url = "";
$type_name = "";

if ($type) {
	$type_url = "&type=$type";
	$type_name = team_type_name($type);
}

$offset = get_int("offset", true);
if (!$offset || $offset % $teams_per_page)
	$offset=0;

if ($offset < ITEM_LIMIT) {
	$cache_args = "sort_by=$sort_by&offset=$offset$type_url";
	$cacheddata = get_cached_data(TOP_PAGES_TTL,$cache_args);
	//If we have got the data in cache
	if ($cacheddata){
		$data = store_to_teams($cacheddata); // use the cached data
	} else {
		//if not do queries etc to generate new data
		$data = get_top_teams($offset,$sort_by,$type);
		
		// Calculate nusers before storing into the cache
		foreach ($data as $team) {
			$team->nusers = team_count_members($team->id);
		}
		//save data in cache
		set_cache_data(teams_to_store($data),$cache_args);
	}
} else {
	error_page("Limit exceeded - Sorry, first ".ITEM_LIMIT." items only");
}


// Now display what we've got (either gotten from cache or from DB)
page_head(tra("Top %1 teams", $type_name));

if (count($data) == 0) {
	echo "There are no $type_name teams";
} else {
	start_table();
	team_table_start($sort_by, $type_url);
	$i = 1 + $offset;
	$n = sizeof($data);
	foreach ($data as $team) {
		show_team_row($team, $i);
		$i++;
	}
	echo "</table>\n<p>";
	if ($offset > 0) {
		$new_offset = $offset - $teams_per_page;
		echo "<a href=top_teams.php?sort_by=$sort_by&amp;offset=$new_offset".$type_url.">Previous ".$teams_per_page."</a>";
		if ($n == $teams_per_page)
			echo " | ";

	}
	if ($n == $teams_per_page) { //If we aren't on the last page
		$new_offset = $offset + $teams_per_page;
		echo "<a href=top_teams.php?sort_by=$sort_by&amp;offset=$new_offset".$type_url.">Next ".$teams_per_page."</a>";
	}
}
page_tail();

?>
